scholarly journals Applications of differential subordination and superordination theorems to fluid mechanics involving a fractional higher-order integral operator

2021 ◽  
Vol 60 (4) ◽  
pp. 3901-3914
Author(s):  
J. Morais ◽  
H.M. Zayed
Author(s):  
K. AL-Shaqsi

By using the polylogarithm function, a new integral operator is introduced. Strong differential subordination and superordination properties are determined for some families of univalent functions in the open unit disk which are associated with new integral operator by investigating appropriate classes of admissible functions. New strong differential sandwich-type results are also obtained.


2021 ◽  
Vol 66 (4) ◽  
pp. 667-675
Author(s):  
Parviz Arjomandinia ◽  
◽  
Rasoul Aghalary ◽  

The notions of strong differential subordination and superordination have been studied recently by many authors. In the present paper, using these concepts, we obtain some preserving properties of certain nonlinear integral operator defined on the space of normalized analytic functions in $\mathbb{D}\times\overline{\mathbb{D}}$. The sandwich-type theorems and consequences of the main results are also considered.


Author(s):  
Tamer Seoudy ◽  
Mohamed Aouf

In this paper we investigate some applications of the differential subordination and superordination of classes of admissible functions associated with an integral operator. Additionally, differential sandwich-type results are obtained.


2020 ◽  
Vol 65 (4) ◽  
pp. 487-494
Author(s):  
Luminita-Ioana Cotirla ◽  
Adriana Catas

In this paper we obtain some applications of first order differential subordination and superordination result involving an integral operator for certain normalized analytic function.


Author(s):  
Mustafa I. Hameed ◽  
Buthyna Najad Shihab

The goal of this paper is to investigate some of the features of differential subordination of analytic univalent functions in an open unit disc. In addition, it has shed light on geometric features such as coefficient inequality, Hadamard product qualities, and the Komatu integral operator. Some intriguing results for third-order differential subordination and superordination of analytic univalent functions have been installed. Then, using the convolution of two linear operators, certain results of third order differential subordination involving linear operators were reported. As a result, we use features of the Komatu integral operator to analyze and study third-order subordinations and superordinations in relation to the convolution. Finally, several results for third order differential subordination in the open unit disk using generalized hypergeometric function have been addressed using the convolution operator.


2016 ◽  
Vol 53 (2) ◽  
pp. 131-137
Author(s):  
Ping He ◽  
Defei Zhang

In this paper we introduce differential subordination and superordination properties for certain subclasses of analytic functions involving certain linear operator, and obtain sandwich-type results for the functions belonging to these classes.


1999 ◽  
Vol 22 (3) ◽  
pp. 649-654 ◽  
Author(s):  
Yong Chan Kim ◽  
H. M. Srivastava

A number of interesting criteria were given by earlier workers for a normalized analytic function to be in the familiar class𝔖*of starlike functions. The main object of the present paper is to extend and improve each of these earlier results. An application associated with an integral operator𝔉c(c>−1)is also considered.


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